So, this might be an interesting spin on these music threads. 'Popular' is subjective, so I'll help give an idea of what I mean. You can pick an 'overplayed' song or a song that's just transcended into culture. It doesn't matter if it was popular or still is, it just had to have a 'familiarity' at some point in the song's existence.
For me, I'd say one of my favourite songs (Also by one of my favourite musicians) is 'http://www.youtube.com/watch?annotation_id=annotation_802668&feature=iv&src_vid=YkADj0TPrJA&v=Qt2mbGP6vFI' by Phil Collins.
What's your favourite 'popular' song, CD?
(Edit: Though this should go without saying, please, if you intend to post a link to the song, make sure the language of the video is within the rules of BGSF's language regulations.)